How many miles on a tank typically?

[nicecar]

used the 02 s for 5 years on a sales route....always 280 miles per tank, staying in the throttle alot. mixed bag of traffic conditions. Come to think of it going to Sebring all highway around 300 mpg. Wait....am I really talking about gas mileage...who cares ,drive it like you stole it. You have plenty of money you own a Porsche!